[kbuild-all] [drm-drm-misc:drm-misc-next 5/9] drivers/gpu/drm/drm_cache.c:202:6: error: implicit declaration of function 'mem_encrypt_active'

tree: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next head: 14054f2afcd6fcef8270a32cbd7570b4992994c5 commit: 3abc66706385e08f7003ca746be005e4c2152b09 [5/9] drm: Implement drm_need_swiotlb() in drm_cache.c config: riscv-randconfig-p002-20210113 (attached as .config) compiler: riscv32-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add drm-drm-misc git://anongit.freedesktop.org/drm/drm-misc git fetch --no-tags drm-drm-misc drm-misc-next git checkout 3abc66706385e08f7003ca746be005e4c2152b09 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/drm_cache.c: In function 'drm_need_swiotlb': 202 | if (mem_encrypt_active()) | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/mem_encrypt_active +202 drivers/gpu/drm/drm_cache.c 180 181 bool drm_need_swiotlb(int dma_bits) 182 { 183 struct resource *tmp; 184 resource_size_t max_iomem = 0; 185 186 /* 187 * Xen paravirtual hosts require swiotlb regardless of requested dma 188 * transfer size. 189 * 190 * NOTE: Really, what it requires is use of the dma_alloc_coherent 191 * allocator used in ttm_dma_populate() instead of 192 * ttm_populate_and_map_pages(), which bounce buffers so much in 193 * Xen it leads to swiotlb buffer exhaustion. 194 */ 195 if (xen_pv_domain()) 196 return true; 197 198 /* 199 * Enforce dma_alloc_coherent when memory encryption is active as well 200 * for the same reasons as for Xen paravirtual hosts. 201 */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org